Description

In the anime

A Moon Stone in the anime

In Clefairy and the Moon Stone, a giant Moon Stone appeared deep within Mt. Moon, being worshipped by a group of Clefairy who lived there. It was soon stolen by Team Rocket, and ultimately ended up being blown up; the shards from the shattered giant Moon Stone rained down on the Clefairy and caused some of them to evolve into Clefable. In this episode, the characters speculated that the Moon Stone was how various Pokémon—Clefairy in particular—arrived in the Pokémon world. Another giant Moon Stone was later seen in the same location in A Real Cleffa-Hanger.

Unrelated to the other TCG card, a Moon Stone appears as a held item on the Secret WondersClefairy card. It allows Clefairy to evolve on the turn it is played.

Trivia

From Generation IV onward, the Moon Ball is more likely to catch Pokémon that evolve via Moon Stone. While this was intended to be the case in Generation II, the Poké Ball always has 1× effectiveness due to a bug.

Through a glitch in the Generation I games, Pokémon that would normally require an Evolution stone to evolve can be evolved without it, provided that the Pokémon levels up in the battle and the player has sent out a specific Pokémon in the same battle. In the case of the Moon Stone, this Pokémon is Exeggutor.